Japan Benex Corporation

What Japan Benex Corporation does

Japan Benex Corporation is a privately-held Japanese industrial company founded in 1957 and headquartered in Isahaya, Nagasaki. It operates two business segments: Contract Manufacturing (precision sheet metal processing, welding, painting, and assembly for industrial equipment, electrical/electronic, and HVAC manufacturers) and Environment and Energy (rooftop solar power generation, EPC services, and smart factory energy management). The Contract Manufacturing business holds what the company describes as Kyushu's largest class precision sheet metal processing capacity, anchored by the first West Japan installation of Amada ACIES punch-laser combination machines.

The Environment and Energy business is the company's primary growth engine. As of April 2026, Japan Benex operates 57 self-owned solar power generation facilities totaling approximately 87.2MW, including the largest domestic rooftop solar installation (~6MW at Kōnan City, Shiga Prefecture). Revenue is generated through FIP (Feed-in Premium) and surplus FIT electricity sales, as well as on-site PPAs with logistics facility operators including Mitsui Estate, LaSalle Investment Management, KDX Realty, and UIB Holdings. The company has co-developed a high-density EV battery reuse storage system with Sumitomo Corporation and Fuji Electric that achieves 2x conventional packing efficiency, and operates an integrated smart factory combining rooftop solar, EV charging, and reused battery storage under its Mirai Factory project.

The company's monetization spans three models: professional services (B2B contract manufacturing and solar EPC), managed services (solar power generation operation), and hardware sales (consumer metal craft model kits under the Bankin Tetsudo brand, distributed through e-commerce, department stores, airport retail, and specialty gift shops). Founded as a small Nagasaki fabrication shop, the company has grown to a headcount of approximately 173 across the group (2017 data) plus a wholly-owned special equipment subsidiary, with a Tokyo sales office supporting enterprise relationships. Leadership transitioned in May 2016 from Masaharu Kobayashi to Yohei Kobayashi as President, with the founder/predecessor continuing as Chairman.

Name

Japan Benex Corporation

Legal name

株式会社日本ベネックス

Website

https://japan-benex.co.jp

Company type

Private

Founded year

1957

Operating status

Operating

Short description

Japan Benex Corporation is a Nagasaki-based Japanese manufacturer operating two segments: precision sheet metal contract manufacturing for industrial and HVAC OEMs, and a rooftop solar power generation business with 57 self-owned facilities totaling approximately 87.2MW across Japan.

Ownership category

akta.pro rank

Headquarters

HQ city

Isahaya

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Contract Manufacturing (受託製造): Precision sheet metal processing, painting, welding, and assembly services for electronic equipment, industrial machinery, and HVAC manufacturers. One-time project-based revenue with multi-year customer relationships.
2. Solar Power Generation Operation (自社発電所): Owns and operates solar power generation facilities. Revenue generated through FIP (Feed-in Premium)制度和残余FIT卖电. Total capacity 57 sites, approximately 87.2MW as of April 2026.
3. EPC Services (設計・施工): Engineering, procurement, and construction services for solar power systems including design, grid connection procedures, equipment procurement, installation, and post-operation maintenance.
4. Consumer Products (板金鉄道): Metal craft model kits for consumers, sold through department stores, airports, online, and specialty gift shops. One-time product sales.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Japan Benex Corporation provides precision sheet metal processing and contract manufacturing services with Kyushu's largest processing capacity, offering one-stop integrated production from product development through manufacturing assembly for industrial equipment manufacturers. The company also operates a solar power generation business through 57 roof-mounted facilities totaling approximately 87.2MW of capacity, providing design, construction, and operation of photovoltaic systems primarily on logistics facilities.

Product overview

Japan Benex Corporation operates two main business segments: Contract Manufacturing and Environment and Energy. The Contract Manufacturing business provides precision sheet metal processing with Kyushu's largest processing capacity, offering products including control panels, air conditioning units, EV charging devices, dampers, cooling units, liquid resistors, and industrial machinery components. The Environment and Energy business operates solar power generation systems under the Solar Port brand, with 57 facilities totaling approximately 87.2MW output. Additional products include sheet metal craft models (Bankin Tetsudo) and the EETAL design collaboration project exploring sheet metal applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Contract Manufacturing (受託製造) Precision sheet metal processing and contract manufacturing services with Kyushu's largest processing capacity. Provides one-stop integrated service from product development through manufacturing assembly for industrial equipment manufacturers including electronic equipment, industrial machinery, HVAC, and environmental equipment producers.
• Solar Port (ソーラーポート) - Solar Power Generation Roof-mounted solar power generation systems installed on logistics facilities under the Solar Port brand. Operates 57 facilities with combined output of approximately 87.2MW, generating revenue through FIP (Feed-in Premium) and surplus FIT electricity sales. Engages in design, construction, and operation of photovoltaic systems.
• Bankin Tetsudo Metal Craft Models (板金鉄道) Metal craft model kits featuring stainless steel sheet metal (0.5mm thickness) miniature train models. Sold through department stores, airports, online e-commerce platforms (Rakuten Furusato Tax, Satofull, Furunavi), and specialty gift shops across Japan. Target audience includes hobby enthusiasts and gift purchasers.
• EETAL Design Collaboration (EETAL) Collaboration project exploring new possibilities for sheet metal processing through design partnerships, presenting products at international design exhibitions such as 3daysofdesign in Copenhagen. Includes furniture and lifestyle products such as metal side tables and stools.

Quantifiable outcome

• 87.2MW of self-owned solar power generation capacity across 57 sites
• +2 more outcomes

Named customers6 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• UIB Holdings / Unified Industrial (株式会社ユニファイド・インダストリアル)coreChannel Partner/ Reseller/ Distributor · 2 April 2026Rooftop solar installation at UIB湖南ロジスティクスセンターⅡ logistics facility. Largest domestic rooftop solar installation at approximately 6MW.
• University of Tokyo (東京大学)minorGTM or Marketing Partner · 1 April 2026Naming rights partnership for '日本ベネックス ルーム' (BENEX Room) at Komaba Campus, 21Komcee East K212 lecture room. 5-year contract through March 2031.
• KDX Realty / KDX Green Energy (ケネディクス)coreChannel Partner/ Reseller/ Distributor · 12 March 2026FIP rooftop solar installation partnership. All power output and environmental value sold to KDX Green Energy. 1.7MW installation at 武蔵嵐山配送センター.
• Mitsui Estate (三井不動産)coreChannel Partner/ Reseller/ Distributor · 2 March 2026Rooftop solar installation partnership on logistics facilities. Mitsui provides logistics facility rooftops; Benex designs, constructs, and operates solar power systems. 4.2MW installation at MFLP座間.
• Nagasaki Velca (長崎ヴェルカ)minorGTM or Marketing Partner · 1 January 2023Official partner sponsorship since 2023-2024 season. Promotional advertising at train stations and airports celebrating team achievements.
• Fuji Electric (富士電機)coreStrategic or Co-development Partner · 17 April 2018Co-developed EV battery reuse storage system. Fuji Electric commercialized the system for industrial sales. Benex contributed high-density packing design expertise.
• Sumitomo Corporation (住友商事)coreStrategic or Co-development Partner · 4 December 2017Joint smart factory project combining solar power, EV charging, and reused battery storage systems. Sumitomo provides energy management expertise and capital for renewable energy projects. Co-developed EV battery reuse system achieving 2x conventional packing density.
• LaSalle Investment Management (ラサール不動産投資顧問)coreChannel Partner/ Reseller/ DistributorEarly partnership for logistics facility rooftop solar installations. First mega-scale rooftop solar project at ロジポート流山, 2.3MW.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Fuji Electric Co., Ltd. Co-developer of Japan Benex's EV reuse battery storage system and industrial controls customer; larger industrial electronics/energy major operating adjacent battery and power electronics markets.
• Mitsui & Co., Ltd. Through Mitsui Fudosan and affiliated logistics platforms, a strategic rooftop-solar channel partner; as a broader sogo shosha, an adjacent enabling participant in energy and infrastructure markets.
• Amada Co., Ltd. Global leader in sheet metal machinery (laser, punch, bending) and processing solutions; upstream of Japan Benex's precision sheet metal contract manufacturing activities, with comparable end customers across metalworking OEMs.
• Kyocera Corporation / Kyocera Solar: Japanese solar module manufacturer and integrated solar EPC/operator with significant distributed and rooftop PV footprint in Japan; broader technology stack but overlapping solar customer base.
• ENEOS Holdings / ENEOS Renewable Energy: Japanese energy major with substantial renewable energy generation and rooftop solar development programs; broader portfolio but overlapping solar generation and ESG-driven customer base.
• Sumitomo Corporation: Japan Benex's strategic partner in the VPP/smart factory and battery reuse programs; a diversified conglomerate with significant energy and infrastructure activities and as a parent-style ecosystem participant.

Direct peers

• Toenec Corporation: Japanese electrical construction and engineering firm active in solar EPC, rooftop PV installation, and energy-saving services for industrial and commercial customers - directly comparable to Japan Benex's environment & energy EPC business.
• 4R Energy Corporation: Nissan-Sumitomo JV focused on second-life EV battery reuse and stationary storage - directly comparable to Japan Benex's high-density battery reuse system co-developed with Fuji Electric.
• Yokowo Manufacturing Co., Ltd. Long-established Japanese precision sheet metal fabricator serving electronics, automotive, and industrial customers; comparable to Japan Benex's precision sheet metal contract manufacturing core.
• SoftBank Energy (SB Energy): One of Japan's largest solar developers/operators with utility-scale and rooftop PV assets - directly comparable to Japan Benex's 87.2MW self-owned solar operating business, though SoftBank operates at materially larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/JapanBenex
• Instagraminstagram.com/japan_benex

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Japan Benex Corporation